Tympan-gage.



Patented Nov. 28, I899.

0. JOHNSON.

ms rm: ca. mama. msnmmon. n. c

UNITED STATES PATENT OFFICE.

OLOF JOHNSON, OF HIBBING, MINNESOTA.

TYM PAN-GAG E.

SPECIFICATION forming part of Letters Patent No. 638,124, dated November 28, 1899.

Application filed May 12, 1899. Serial No. 716,558. (No model.)

To all whom it may concern-.-

Be it known that I, OLOF JOHNSON, of Hibbing, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Tympan-Gages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention contemplates certain new and useful improvements in tympangages for printing-presses.

The object of the invention is to provide simple and highly-efficient means for properly positioning stock on the tympan-pad of the platen-bed of a printing-press.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view showing my attachment applied to the platen-bed of a printing-press. Figs. 2 and 3 are plan views, the latter showing the adjusting-bar moved inward.

Referring to the drawings, A designates a fiat plate having flanged ends a, which are bent down over the upper and lower edges, respectively, of the platen-bed P of a printing press, over which, near one end, said plate is extended. Centrally of the plate is a transverse guidewaya, formed by two overhanging fianges a B is a bar which is positioned parallel with the inner longitudinal edge of the plate A. The lower edge I? of this bar is slightly curved outward. From the center of bar B at right angles thereto projects a fiat plate I), which fits within the guideway a, and from its upper face extends a rib 19 having a series of holes 19 By means of a screw 11 a short post b is secured at any desired point to this rib b and through an eye in said post is passed a wire 0. The outer end of this Wire is secured to a lug d, projecting from plate A. The other or inner end of this wire is attached to the inner end of a lever-D, fulcrumed at d on plate A. By moving this lever on its fulcrum the barB can be shiftedthat is, moved away from and toward the adjacent longitudinal edge of plate A.

E E designate two springs secured to plate A and bar B, the tension of which springs is exerted on said bar, so as to hold it against the edge of the plate. These springs are shown as being formed each of a single wire made fast at their ends 6 to plate A, while their free ends are passed loosely through eyes or loops 6 on the inner side of bar B.

The outer end of lever D is flexibly connected by a link F to a loop-plate f, which is held by a nutted bolt f to the gripper-barf of the printing-press.

In connection with my improvement I usually employ a gripper in the form of a narrow rod f I11 practice the usual stop-pins f are affixed to the tympan-pad so as to have two of the edges of the card or other stock register therewiththat is to say, the lower edge and one side or end, preferably that toward the right. My attachment is placed so as to be opposite the left-hand edge of the card or stock. As the card is placed on the platen it will fall against the lower stops, but will not always be in proper position to receive the imprint of the type; but being within the space between the stop-pins on the right and the adjusting-bar B on the left as the platen is being moved toward the type'- bed the outer end of the lever D is caused to move upward by the connection with plate f. This movement of the lever draws on the wire 0 and throws bar B outward as against the tension of springs E. This bar coming in contact with the stock will cause the latter to properly register with all the stops, and while the printing is being done the bar B continues to hold the stock in proper position. The stock cannot be bulged or crowded by the bar, as the springs E are loosely connected thereto. As the platen is moved away from the typebed and the pressure on the lever D is relieVed the plate B is returned to its normal position by the springs E.

The attachment is composed of but few parts and is accurate in its operation and not liable to readily get out of order.

I claim as my invention- 1. The tympan-gage herein described, comprising a plate, a bar paralleling one edge of said plate, a flexible connection between the bar and plate and means for forcing said bar gway from said plate, substantially as set orth.

2. The tympan-gage herein described, comprising a plate having a guideway, a bar paralleling one edge of said plate having a portion movable in said guideway, a spring connected to said bar and plate, and means for moving said bar away from said plate, substantially as set forth.

3. The tym pan-gage herein described, comprising a plate having a guideway, a spring held bar paralleling one edge of said plate and having an angular portion movable in said guideway, a wire, or the like, held at one end to said plate and engaging said angular portion, a lever fulcrumed on said plate and to which the other end of said Wire is secured, and means for shifting said lever, substantially as set forth.

4. The tympangage herein described comprising a plate, a bar paralleling one edge of said plate, springs secured to said plate hav-,

ing a sliding connection with said bar, a lever, means for operating the latter, and a connection between said lever and said bar, substantially as set forth.

5. The combination with the plate having a gnideway, of the bar having a right-angular portion movable in said guideway, an adjustably-mounted post carried by said angular portion, springs secured to said bar and plate, a wire fast to said plate at one end and engaging said post, a leverto which the other end of said wire is secured, and means for shifting said lever, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscrib- 35 ing Witnesses.

OLOF JOHNSON. WVitnesses:

J. A. MOINTYRE, T. WALDO MURPHY. 

